Very nice build Chris, I've used yours and Prez's build logs as an aid to mine.
Ironically I thought I'd done the same as you on the engine and spent an hour stripping and rebuilding ( I didn't use much glue as it pretty much snaps together) until I realised the hole in the cowling was at the top rather than the bottom.
I'm glad you like the MA metallics, I didn't think they would adhere that well to the fishing line due to its shiny surface, I was more promoted their use on ez line. They spray ok as well, but I've yet to find anything that beats Gunze Copper.
I think all engines should be made of Copper it really stands out

its a shame this one is all but hidden